. >> the u.s. national security agency is gathering billions of records from mobile phones worldwide according to leaked top secret documents given to the paper by former edward snowden. the report says 5 bill yop records every 24 hours allows u.s. intelligence officials to track the movement of people in ways that were unimaginable. using tools such as code traveller, which can map relationships geographically with people and their most. american people say it is legal. it's a breach of privacy. let's discuss it with the ceo of spark digital, a digital marketing and social media company. to know the n.s.a. is spying on people using their mobile phones, sure that is no surprise. what is interesting about that to you. >> what is interesting is what they are tracking. date, time, speed, trajectory. that's what they are keeping historical records of. what is a lot of people don't know is they are not just looking at it just at this moment, but backwards in time when the phone came online. >> code traveller, meaning they can work out which group of people from in proximity to each other.